Motor-controller.



A. I. HORTON.

MOTOR CONTROLLER. APPLICATION FILED'SEPT. 12. 19m.

1,163,150. Patend 111111915.

P 31511. Y L' COLUMBIA PLANoukAm-x co.. WASHINGTON, D, c.

`UNITED sTATEs PATENT oEEicE.

, ALBERT J. HORTON, OE WHITE PLAINS, NEW YORK, AssIGNoR To THE OUTLER-HAMMER MFG. CO., 0F MILWAUKEE, CONSIN.

WISCONSIN, A CORPORATION OE WIsy MOTOR-CONTROLLER.

Specification of Letters Patent.

Patented Dec. *7, 1915.

To all whom t may concern Be it known that I, ALBERT J. HORTON, acitizen of the United States, residing at White Plains, inthe county ofWestchester and State of New York, have invented new and usefulImprovements in Motor-Controllers, of which the following is a full,clear, concise, and exact description, reference being had to theaccompanying drawing, forming a part of this specification.

This invention relates to improvements in circuit controllers. l

In my Patent No. 1,122,931, granted Dec. 29, 1914, there is disclosed acontroller for motor driven printing presses and other ap-l paratus,wherein a two-push-button control station provides for inching, forcontinued operation at different speeds, and for stopping at will, andthe present invention has among its Objects to provide a two-pushbuttonstation Operable to accomplish the foregoing and alsolockableto insureagainst starting.

Various other Objects and advantages of the invention will hereinafterappear.

One embodiment of the invention is illustrated in the accompanyingdrawing, which will now be described.

In the drawing, Figure 1 illustrates the controller diagrammaticallyand, Figs. 2 andl 3 illustrate in frontelevation and vertical section amechanical. embodiment of the push-button station diagrammatically`illustrated in Fig. 1.

Referring to Fig. 1 the same shows an electric motor M', anelectro-responsive switch S controlling the continuity of the` motorcircuit, an electromagnetically oper ated rheostat R for acceleratingthe motor and a two-push-button control station S. for controllingv theswitch S and rheostat R. The motor M has for the purpose of illustrationbeen shown as having an armature A and a series field winding F, itbeing understood that any preferred type of motor may be employed. Theswitch S and rheostat R are both of conventional form. The switch S isprovided with a normally open auxiliary switch 5 adapted to be closedupon response of said switch S. The rheostat R is provided with switcharms 6, 7 and 8 operable by a solenoid 9 to successively engagecoperating stationary contacts to gradually exclude the resistance 1'from the motor ciradapted in one position to bridge contacts 18 I and inanother position to bridge contacts 19.v As will hereinafter appear,engagement of the disk 17 with either set of its co- Operating contactsmay be effected by operation of a push-button 20 and by an adjustment ofsaid push-button, said disk may be locked out of engagement withcontacts 18.

Referring nowjto Fig. 3, both push-button switches are inclosed in acasing 21, their stationary contacts being mounted upon an insulatingbase 22 lixed to the rear wall of said casing. In practice the two setsof contacts of each switch are arranged at right angles and inconsequence Fig. 3 shows only one contact of each set. Referringspeciically to switch 10 lthe push-button 16 thereof is reciprocablymounted in the front wall of the casing and has a stem 23 reciprocablein a bearing 24 on the rear wall of the casing. Both disks 12 and 13 areloosely mounted upon the stem 23 and are normally spread apart to engagetheir respective contacts by an interposed spring 25. The stem 23 alsohas mounted thereon and fixed thereto, to the rear of the disk 13, acollar 26 and iiiterposed between this collar and the rear wall ofthecasing is a second spring 27 of greater strength than the spring 25. Thepushbutton 16 by an abutment with the contact disk 12 provides fordisengaging said disk from its contacts 14 while the spring 27,

when permitted to force the collar 26 against the disk 13, provides fordisengaging said disk from its contacts 15. The normal positions of thecontact disks and the effect of depression of the push-button aregoverned by radial stops 28 and 29 on the push-button and a radial slot30 through the front wall of the casing. The pins 28 and 29 areangularly disposed with respect to one another and are arranged atspaced points longitudiu nally of the push-button to lfunction asfolholds the push-button in a semi-depressedl position, spacing thecollar 26 from the disk 13 and thereby relieving said disk of thepressure of spring 27. Under such 'condi-V' tions the disks 12 and 13are normally maintained in engagement with their respective contacts bythe spreading spring subject to disengagement of disk 12 fromits'contacts 11 by further depression of the pushbutton 16 and to returnVby the spring 25. Assume now that the push-button 16 be rotated toaline the pin 29 with the slot 30, then the push-button would bereleased for full outward movement and the spring 27 would force thecollar 26 against the disk 13, thereby normally holding said disk out ofengagement with contacts 15 subject to reengagement by depression ofpush-button 16. Again-assume that the push-button be ,held insemi-depressed position, as aforesaid, then the Vdisk 12 might be'locked out of engagement with its contacts 11by alineing pin 28 withslot 30, then depressing the push-button 16 to the i'ull extent and thenturning said push-button until pin 28 lengages the rearface of thecasing wall.

Referring now to switch 11 the push-button 20 thereof is provided with astem 31 and is mounted in the casing similarly to switch 10. lts disk 17isloose upon the stem 31 and is held by means of a spring 32 against acollar 33 fixed to said stem. The collar 33 in turn is vbiased outwardlyby a spring 31 similar to the spring 27. Thus the' arrangement is suchthat the spring 31 tends to force the disk 17 into engagement with itscontacts 18 subject to disengagement therefrom and engagement with itscontacts 19 by depression of pushbutton 20. The pushbutton 2O has tworadial spaced pins 35 and 36 coperating with two radial slots 37 and 38in the front wall of the casing, as best illustrated in Fig. 2. Asillustrated in Fig.

3, pin 36 engages the rear face of the casing wall holding thepush-button in a semi-depressed position, thereby disengaging the disk17 from its contacts 18. Under such conditions, with the pin 35 alinedwith the slot 37 the button 2O may be depressed to move the disk 17 intoengagement with its contacts 19 and when the push-button is released thespring 31 restores said disk to the position illustrated. The disk 17may, however, be freed Jfor engagement with contacts 18 by rotating thepush-button 2O until the pins 35 and 36 both aline with the slots 38 and37 respectively, whereupon the spring 31 will Jforce the push-buttonoutwardly until the aforesaid engagement of said disk is effected. bedepressed to move the disk 17 out of engagement with contacts 18 andinto engage- Then the push-button 2O may ment withcontacts 19 subject toautomatic` return of said disk by spring 31 into engagement with saidcontacts 18. Y

With the foregoingv operations of the push-button station iii-mind itwill be observed that the following control of the motor may' beeffected: Assume lirst that the switchesA are set to normally stand inthe positions illustrated. The motor may be .startedl and accelerated bydepression and ductor 12 through the contacts 17 and 19 of switch 11,byconductor 13 to line L. This causes response of switch S which completesthe motor circuit from line L by conductor 11-through the resista-nce 1of rheostat YR, by conductor 15 through the motor armature A and seriesield winding F, by conductor 16 to line L. The motor is thus started andas soon as the switch 11 is released the solenoid 9 is energized tooperate the rheostat R and thus exclude the resistance r from the motorcircuit. The circuit of solenoid 9 may be traced from conductor 11 byconductor 17 through said solenoid, by conductor `18 through thecontacts 17 and 18 of switch 11, by conductor 19 through the auxiliaryswitch 5 of main switch. S, by conductor 50 to line L. 0f course,release of the switch 11 to accelerate the motor interrupts theenergizing circuit of the main switch but as soon as the main switchresponds, it establishes its own maintaining circuit from conductor 12through contacts 13 and 15 ofV switch 10, by conductor 51 through asuitable resistance r, by conductor 52 through auxiliary switch 5 and byconductor 50 to line L. Thus, as above stated, `depression and releaseof the switch 11 effects starting and acceleration of the motor. Assumenow that it is desired to start the motor forceperation at slow speed,then prior to starting the switch 11 is adjusted to lock the disk 17 outof engagement with contacts 18. This still enables the motor to bestarted by depression of the push-button 20 as above described but uponrelease of the push-button limits the movement of the disk 17 tolprevent energization of the solenoid 9 of. the rheostat R.. For stoppingthe motor when started, as above described, the switch 10 is operated bydepression of its push-button 16 to disengage disk 12 from contacts 11.Disk 12, and contacts 11 are included in the maintaining circuit of theswitch S and hence upon separation denergize said switch and accordinglystop the motor. In the event that the solenoid 9 is energized when themotor is stopped then the switch S through its auxiliary switch 5disconnects said solenoid scribed. Under these conditions it will beobserved that inasmuch as the main switch S is deprived of itsmaintaining circuit the push-button 20 must be manually depressed aslong as itis desired to maintain the motor in operation and that as soonas this button is released the main switch will be denergized and themotor immediately stopped.

Assume now that it is desired to inspect or repair the apparatus drivenby the motor and to insure against unexpected startingv during suchinspection or repair. This may be accomplished by adjustment of theswitch 10 as above described to lock the contact disk 12 out ofengagement with contacts 14. This disk and its contacts, as will benoted, are in the energizing circuit of the main switch S between saidswitch and the starting switch l1 so that obviously when the switch 10is set as described the switch 11 will be ineffective to start themotor. In practice it is quite customary to provide a number ofpush-button stations whereby the motor may be controlled as abovedescribed from any one of the same, and in such cases it will be obviousthat by connecting the contacts 14 and disk 12 of all stations in seriesin the energizing circuit of the main switch, lockout of any one of thedisks 12 will render all stations temporarily ineffective for starting.

What I claim as new and desire to secure by` Letters Patent is:

1. In a motor controller, the ycombination with electro-responsivestarting means, of a control station therefor including two pushbuttonswitches one operable to eil'ect starting and the other operable toeffect stopping, said latter switch being adapted to be set in aposition to prevent starting by said former switch.

2. In aA motor controller, the combination with electro-responsivestarting means, of a control station therefor including two push-buttonswitches, one being depressible to effect energization of said means forstarting and the other being adapted to be set in diiierent positions torender continued energization of said means either dependent upon orindependent of continued depression of said first mentioned switch or torender said first mentioned switch ineffective to energize said means.

3. In a motor controller, the combination with electro-responsivestarting means, of a control station therefor including two push-'button switches, one depressible to energize said means for startingand the other depressibleto denergize said'means for stopping,said'latter switch being also adapted to ybe set in different positionsto render continued energization of said means either independent oi' ordependent upon continued depression of said lfirst mentioned switch orto Vrender said first mentioned switch ineffective to energize saidmeans.

4.. In a motor controller, the combination with electro-responsivestarting means, of a ycontrol station therefor including two push-buttonswitches, one depressible to energize said means for starting and theother being depressible to denergize said means and lockable indepressed position to render said first mentioned means ineiiective forstarting.

' 5. In a motor controller, the combination with electro-responsivestarting means, of two push-button control switches therefor jointlycontrolling the energizing circuit of said means whereby said means maybe energized by depression of one of said switches when the other is ina predetermined position, said latter switch being adapted to beset in aposition to render said former switch ineffective to energize saidmeans.

6. In a motor controller, the combination with electro-responsivestarting means havu ing an energizing circuit and a maintaining circuit,of two push-button switches jointly controlling the energizing circuitof said means whereby said circuit may be closed upon depression of onewhen the other is in a predetermined position, said latter switch alsocontrolling said maintaining circuit and being adapted to be set inposition to render continued energization of said means dependent uponor independent of continued depression of said rst mentioned switch orto render said first mentioned switch ineilective to energize saidmeans.

7. In a motor controller, the combination with electro-responsivestarting means having an energizing circuit and a maintaining circuit,of a push-button operated switch controlling both of said circuits, saidswitch being depressible to open said energizing circuit and havingmeans to releasably lock `the same iny depressed position.

adapted to be set in one position to inten-5v and interrupt saidmaintaining cirouinorV in a third( position to complete its respeetive.portion-of both of said Circuits.

10. In a motor controller, in Combination, eleotroresponsive startingmeans having an energizing Circuit and a maintaining circuit, of apush-button operated switch havinga movable 'Contact in said maintainingcircuit and a second movable Contact common to both Vsaid energizing andmaintaining circuits, said Contacts being operable by a commonpush-button and being adapted to be set in different positions tointerrupt bothoirouits or to interrupt only said maintaining circuit.

11. In a motor controller, in combination, electro-responsive startingmeans having an energizing circuit and a maintaining oirouit, of apush-button operated Switch having a movable Contact in said maintainingcircuit and a second movable Contact 'oommonto both said Venergizing andvmaintain- Copies of this patent may be obtained fior five cents eah, pyi I Washington, D, C.

ngf Qrenits, Seid @entente being Operable by .a @emmen pnsh-bnttenandbeingfednpted to be set in dierent positions to interrupt both eirenits0r te interrupt only said maintaining circuit or to complete theirrespective portions of both oirouits.

l2-l In arnotor eQntrO11er.,- the Combinationwith eletro-responsiveStarting means having ail-energizing circuit and a maintaining Circuit,O n pnshrbntten switch Controlling beth of Said Circuits andY beingadapted t0 be set in different positions to complete its respeetiveportion of both of said circuits or .interrupt'either of said circuitsand a second pnsh-,button switch depressible to energize saidY meanssubject to control by Seid irst mentioned swteh- In Witnesswhereof,V Ihave hereunto subscribed Iny name in the presence of two Witnesses.VV

ALBERT J. Hon-TON.

Witnesses W L- GULLY, W. C. WINTERROTH.

adcplrepssing the t Commissioner of Batents.

